M4.1 earthquake 71 km S of Akutan, Alaska

A magnitude 4.1 earthquake struck 71 km S of Akutan, Alaska on Sat, May 20, 2023, 7:19 PM AKDT (03:19 UTC), 35 km (22 mi) below the surface.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
4.1	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.158 · 11 stations
3.8	ML, local (Richter)	Alaska Earthquake Center	Preliminary

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 141 in the 60 days after this one and 106 in the 30 days before it.

The first 60 of 141.

From the USGS Earthquake Hazards Program and its partner networks, event us7000k3dd (also filed as ak0236h8oc2y). Read Sat, Oct 3, 2026, 7:52 AM UTC.